“What Is A Fact About The Human Body That Not Many People Know About?” (50 Answers)
The human body is everything that makes up, well, us. However, there are plenty of fascinating things we don't know about it, or rather, ourselves.
Once you look closer, dive under the surface of the skin, explore the inner workings of the biological systems that ensure our everyday life, you just can't help but admire the marvel that you really are.
To learn more about our bits and pieces, Redditor u/Zenssei made a post on r/AskReddit, asking other platform users to share some facts about the human body that not many people know about. Their call to action was immediately answered.
u/Zenssei said the idea for this post came to them pretty naturally. "I was just watching TV, thinking of [something] I could post on r/AskReddit," they told Bored Panda.
"I have learned quite a bit from the comments such as there is a right and a wrong way to swallow, or that about 20% of people have a bone ridge on the roof of the mouth... It was fun reading through the replies."
As of this article, the post already has received over 56K upvotes and 23K comments, and has become one of the coolest online trivia archives out there!
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Your brain regulates how strong your muscles are. If your leg muscles were to contract at full strength, they would snap your femur.
Its why people in emergencies on adrenaline can lift cars off children. Your body is capable of great strength, but it could also severely damage you, so your brain keeps you a weak, soft bag of jelly.
You also have enough strength in your jaw to bite your tongue in half but your brain won't let you do that either.
But that's a concious thing, unless you accidentially bite yourself during eating, then it's a reflex. If you really want to bite your tongue off, you can.
Load More Replies...Drugs can have the same effect. That's why some "weak looking" person can need about 4 policemen or alikes to be held and handcuffed.
And add crazy to the drugs and an elephant won't stop them
Load More Replies...That or you're exposed to enough gamma radiation to kill a football team but luckily your super power is being Mark Ruffalo and you come out alright.
Oh, I was always asking myself about superman and his superpower in aaaall his muscles. I was worried about his partner.
Load More Replies...My brain is getting even more protective as I age. Its pretty much got me limited to lifting nothing heavier than a 12 ounce beer or the remote.
This is simlpy not true. While it is true that your body limits the strength of your muscles, this is neither done by the brain, nor are the muscles in your extremeties strong enough - or even in the right angle - to break your own bones. There are many conditions where muscles lock up with full contraction and that can break your bones, but this "only" affects ribs and vertebrae.
Now I have something to blame the fact that I never win arm wrestles on!
When doing surgery where the doctors have to take out some organs, when placing them back, they don't have to be put back In the exact position there meant to be, your body kind of just, moves the organs into the correct position after the surgery
Now all my body has to do is figure out how to take my foot out of my mouth.
OR nurse here. Thinking specifically about the small intestines. The surgeon can put them back in, but they'll never fit as perfectly as they did before they came out. A lot of tissue that was holding them in that sort of 'perfect' position had to be dissected in order for them to be loose enough to sit outside the body. Think of it like removing slimy cobwebs. You can't reattach the cobwebs.
I feel a little validated, thank you! I had an ileocystoplasty (using a piece of my small intestine) when I was a pre-teen. I swear 'digestive feelings' never felt right afterwards. My parents and the doctors said I was imagining it. :( I got used to the new feeling eventually but still didn't like them gaslighting* me. *closest term I could think of to how it felt
Load More Replies...My bro-in-law who works at a hospital said a higher proportion of surgeons have psychopathic traits as compared to the regular population. Guess some of those traits help in the field of surgery.
Totally believe that - why else would their patients all be unconscious!
Load More Replies...During my son's C-section birth, I was surprised when they flopped his mom's uterus out of her body cavity to clean under it. Yet another reason to thank my y chromosome for a more simple anatomy.
But don’t let them place the balls back where the heart is or somethin like that
I know right? At least make the effort! Don't just squash it back in like stuffing in a Turkey! Worked for 8 years in a hospital - I met one doctor who was kind to every patient and actually remembered my name! I was shocked!
Load More Replies...Especially when you have a c-section and see your organs in a plastic tub next to them - this hits different, lol.
I was just gonna comment that. It took a couple of years for me. Every now and then, it would feel like a baby moving. Didn't hurt, just felt funny
Load More Replies...There are many ways we could look at the human body. "On an evolutionary scale, sometimes we are similar to animals, and sometimes we're not," general practitioner, medical researcher, and founder of PrimeHealth Clinical Research, Iris Gorfinkel, M.D., told Bored Panda. "We're symmetric, [our] basic body structure is similar; we have what's called homologous bone structure. In other words, you can find exact similarities between humans and other animals and how our bones are put together."
"Even our muscles and heart and vascular systems are similar. Our lungs are often similar too. [As well as] the fact that there's a long tube from the moment food enters our mouth to the point at which it goes out of our rectum," Gorfinkel explained. "Their breathing is similar to ours neurologically. Urologically (how urine is formed), we're also quite similar. In all of these aspects, we are very similar to animals."
People who live in "extreme" conditions for generations adapt in extreme ways. For example people that live in high elevations often have larger lungs and different blood makeup. Or my favorite is the Bajau people that live on the water and spend a lot of their time diving, their spleens have become 50% larger in order to store more blood.
maybe that's a result of the bigger spleen, more blood to hold oxygen.
Load More Replies...To be pedantic, these are examples of evolution, not adaptation. A mountain climber sitting at Everest base camp is allowing their body to adapt to the lower oxygen levels. The Nepalese who live there have evolved to better handle the environment because the ancestors who were genetically able to handle it were more likely to have kids and pass that on. Take them out of the mountains and they still have those genes.
This is called epigenetics, a mechanism to adapt without actually changing the DNA.This both positively and negatively can mean for example that your parents behaviour will change your capabilities.
No - not entirely, at least. Epigenetics merely affect which selection of one's genes is being accessed, but the capabilities those genes provide depend on their DNA sequence (the "real" genetics, basically). According to wikipedia, the Sama-Bajau have an increased frequency of certain alleles found in the Asian population - alleles meaning variants of the DNA sequence. Basically, genetic variants that improve diving capabilities already existed in the Asian gene pool, just at lower frequencies and not all variants at once in the same individual, and natural selection has favored those variants in the Sama-Bajau, leading an increase and increased co-occurrence if those variants in the population. Which is exactly how old-fashioned evolution occurs without involving epigenetics.
Load More Replies...So does this mean I could also hold my breath underwater more than most? (I randomly have three spleens)
I remember watching a really neat documentary on the Bajua people. Since diving is an everyday activity and part of their livelihood, some Bajua would puncture their eardrums in order to better withstand the crushing pressure of diving deeper.
Not necessarily store more blood but more oxygen in the blood so their brain doesn't get effected by loss of oxygen...
You hate the sound of your recorded voice because it's missing the low frequency you're used to hearing.
When you talk, you hear your voice as it goes to the air and back to you ear. It also goes through your skull to your ear, and this bone conduction mechanism transmits the low frequencies better than air does.
Your recorded voice only has the air transmitted sound. That causes the dissonance between what you think your voice sounds like, and what it really does. It's also why your voice will (almost) always be higher pitch than you think.
I hate listening to recorded phone messages of my voice. It actually sounds more lower pitch than I realize.
That's because your ears were installed upside down
Load More Replies...I am a soprano but in my head I don't sound as high as I am and people think i'm younger than I am.
You are also prettier then you see and more intelligent then your brain let you believe.
Higher pitch is wrong. It's the same pitch, just some frequencies missing. It sounds higher because of the missing bass, but it's still the same pitch.
You can try this out, play a note on like a guitar, sing the note and record you singing it, play it back and play the note again. If you can match the note you will still be in harmony on the recording.
Load More Replies...So is the recorded version your actual voice? because if it is I need to have some kind of surgery stat!
Same. I sound like bullcrap through audio. I guess that explains why I don't have as many friends as I should.
Load More Replies...But if we continue to measure ourselves against animals, we inevitably start noticing differences. "Animals communicate across miles of land through subsonic sound, that's true. But human beings, on the other hand, have very complex language systems," Gorfinkel said. "We have introspection—that's another critical difference, [as well as] our creativity and emotions, like joy and sorrow and grief—although grief has been described in some animals, including elephants, wolves, and sea lions. But the biggest difference that makes us humans a complete and utter separate category within the animal kingdom, is our ability to have an imagination, to use language in such a complex way, and to hold fictions in our mind."
The comparison that Gorfinkel thought of on the spot illustrates her point on a meta-level. "Let's just say the lion is the guardian spirit of our tribe. He still could never convince a monkey to give him a banana by promising the little guy, say, an unlimited supply of bananas in monkey heaven. So our ability to create and believe in collected fiction, that's what makes human beings really different."
The heart smells like mushrooms.
Source: I’m a cardiac anesthesiologist
They haven't said they're not, just that they are a cardiac anaesthesiologist. They could well still be a canibal as well.
Load More Replies...Yes, you can because you are 100% correct!! All the yummy taste and no cow got hurt. I will never forget my first portobello shroom - total game changer. Amazing xxxx
Load More Replies...That's not a fact. The only fact here is that this specific person thinks it smells like mushrooms
Brought back a memory: when studying massage we were taken to the uni wet-labs to see and handle some dissections to get a better understanding of the actual 3D layout of the muscles and bones, glands, nerves, etc. I noticed an open doorway beyond which was a room where two people were sitting at a table working on something, and a smaller adjoining room between. We were welcomed in, and passing through the smaller room I notice a bunch of large plastic tubs stacked up. On the way out I noticed them all labeled "Heads", "R. Arms", "Torsos", and so forth. And the pair were each working on dissections. I spoke with one, a woman who had half a head and was using a scalpel to slice away the flesh around the cheek and jaw to expose the trigeminal and facial nerves. I was curious and asked simple questions - what's the job like, how'd you get into this, that sort of thing. And it just makes me laugh every time I remember her telling me that the only real drawback was when on dates responding to the question "So, what do you do?".
I've never heard someone refer to themselves as a "cardiac Anesthesiologist."
Humans have, on average, just as many hairs on their body as chimpanzees, human hair is just a lot shorter and finer.
*looks at hairy self and wonders, chimps have these many as well?*
Load More Replies...And men and women have the same amount of hair, too. Just look different.
Not so much these days, apparently - both practically completely bald. I find it weird to hear guys saying it looks weird when they see a naked woman with pubic hair.
Load More Replies...but we feel it necessary to spend a good part of our life plucking, shaving and waxing it. 🤦
Also, it seems other primates are much less likely to judge others based on the color, location, and volume of said hair (except perhaps silverback gorillas).
Well, you just count how many in a small area, like a square inch, sample different locations, and extrapolate from there. It's an estimate. Like the number of stars in the galaxy - we can't even see most let alone count, but we can make a "pretty close" guess (anywhere between say 3.5 and 5 hundred billion seems to be the ballpark - "pretty close").
Load More Replies...Some parts of our body, however, remain unknown even to science. Take the human brain for example. It has approximately 86 billion neurons, woven together by an estimated 100 trillion connections, or synapses. So untangling such a delicate network is a daunting task—we don't know the details of how those cells work, let alone how they come together to make up our sensory systems, our behavior, our consciousness.
"You would think it would be easy [to study the brain], it weighs only three pounds, and three-quarters of it is water and 60% of it is fatty tissue. And you'd also think it's easy because the brain can't feel pain. You know, surgery could be done on it, allowing for easy experimentation, as inhumane as it sounds. But there are several things that make it extremely difficult," Gorfinkel said.
"[Our billions of neurons], connected by trillions upon trillions of synapses in a barrel, is a veritable neuronal forest, and the information is moving at all different speeds, some up to, I think, 250 miles an hour. So even with things like functional MRI [we don't get close to] the nitty-gritty of understanding the very fine neuronal connections that are happening, that really define memory, that define all the complexity that I was just describing: language, reason, creativity, and emotions."
Your eyes have a separate immune system from the rest of your body and in a lot of occasions if your body's immune system finds your eyes, they will assume they are a foreign body and blind you.
I would like like more details. The eyes are not connected to the lymph system (which is the main part of the immune system) in an attempt to keep the eyes as see-through as possible, but antibodies and immune cells do reach the eyes via the tear liquid. From what I could gather, the cellular components of the immune system keep largely away from the eyes - which is referred to as an "immune privilege" - but the eye doesn't have an own extra immune system, it just relies on the default antibacterial enzymes and such which exist in the rest of the body, too. I was able to find autoimmune diseases that affect other parts of the body _and_ the eyes, or that affect the visual nerve, but none that specifically attack the eye tissue due to it's relative immune separation.
What you write here is something that i knew and what's written up there confused me to be honest...i knew the systems are not connected but not that there is a separate system which i doubt! You made it clear and it seems more accurate
Load More Replies...It's because the lenses encapsulate before the immun system after birth is built and so your body never gets the chance to learn the inside of the lenses are a part of the body. With age the surface of the lenses may get fractures leading to your body attack the inside of the lenses thus leading to cataract.
Thank you! The article was so poorly written but you explained it perfectly.
Load More Replies...Yes please??? So we can avoid them?
Load More Replies...Unfortunately, this is true. Your immune system can 'attack' your own organs. I had a bad bout of Flu which caused me to lost my hearing in one ear for about a month. I thought I acquired Autoimmune Inner Ear disease. Fortunately, it rectified itself, but it wasn’t a pleasant time.
Immune system: hmmm I wonder what in this part of the head... *find eyes* Immune system: AHHHHHHHH Eyes:AHHHHHHHHHHHH Immune system:AHHHHH SHOOT IT SHOOT IT WHAT EVEN IS THIS Eyes: WHO THE HECK ARE YOU Immune system: *too busy shooting eyes* You: *gets blinded* Immune system: ( ‾ʖ̫‾) phew. My work here is done.
for those of us who still have vision, are our eyes hiding from our immune system our entire lives?
It's not the eyes, but the lenses, they encapsulate before the immunsystem starts to work. So when the surface of the lenses get fractures (mostly due to old age) the immunsystem will attack the innerts of the lenses leading to cataract.
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Humans are bioluminescent and glow in the dark, but the light that we emit is 1,000 times weaker than our human eyes are able to pick up.
I'm not concerned that animals can see me. I just want to know which ones.
Load More Replies...Sooooooo, put 1000 peoble in one spot and stand some distance away...?
Not when you are alone in the forest or jungle though
Load More Replies...We are bioluminescent? Okay that’s kinda cool and kinda weird- in what environment did we live in that made us adapt to be bioluminescent? Or did our distant ancestors have this ability, and did it fade over time?
It's an energetic byproduct of normal chemical reactions - like warmth, but in much, much lower quantities. And it's in no way unique to humans.
Load More Replies...I honestly never this myself. I found an article from National Geographic detailing this is more detail: https://www.nationalgeographic.com/science/article/photographing-the-glow-of-the-human-body
Load More Replies...Christof Koch, Ph.D., Chief Scientist and President of the Allen Institute for Brain Science, and his colleagues study the brain on a large scale. But the more they look at many or most cells in the brain rather than just a few, the more they realize that even the parts of neuroscience they thought the field had nailed down are more complicated than anyone had realized.
"There may not be any simple path to understanding complex systems shaped by natural selection,” Koch thinks. "Evolution doesn't care about elegance. The brain doesn't care if you understand it."
When you cry and your nose becomes runny, it's actually your tears.
Doctors not needed for this. Move down the inner corner of your eye a bit and check it out in the mirror. There's a tiny dot on the corner of your lower eyelid - the tear duct. It connects your eyes with your nose. There is a low but constant flow of tear liquid in your eyes to wash away tiny dust particles, which usually flows down the tear duct unless excessive production of tear liquid exceeds its capacities, causing the eyes to overflow.
Load More Replies...Knew that, tear ducts open into eye, but eye drains into sinuses as well as down face.
This actually explains why, when it's windy, my eyes tear up and also I have to blow my nose.
The reason it's so easy to break your collar bone is because its designed to break.
The way it was explained to me is that its like a circuit breaker. It breaks there to stop the shock of impact getting to your spine
I'll one-up you - broke mine when I was four at the day care. Fell over the edge of a slide while looking down at a fellow prisoner. Big-ole-head took me right on over!
Load More Replies...Interesting fact: Sometimes doctors/nurses will intentionally break the collar bone of a baby passing through the birth cannel in order to help get the shoulders out. Otherwise it could create a hardship on the child and mother. (It depends on how the baby presents during birth. It doesn't happen often but it is a tool they use.)
My friend's baby had her collarbone broken at birth. You had to be very careful with her (even more careful!!) in the beginning. Especially with picking her up (from her crib etc.). Luckily babies bones heal much faster than our adult bones!
Load More Replies...Idk. I assume it's easier to evolve a crumple zone than a shock absorber.
Load More Replies...side note: dogs don't have collar bones and the clavicle is what allows us humans to be able to swing our arms 360 degrees
Maybe you can swing your arms 360, but after 5 rotor cuff repairs and full tears on both side again, arms only go to right below shoulder height, unless I am drugged
Load More Replies...Didn't ever break or even see my collar bone - have built an own crumple zone of fat around it to protect it. 😁
Broke mine at age 40 tripping over my overly anxious dog. I was moving, it was the last day in the old house, and dog knew something big was up since the house had become empty and I was constantly on the move. He stuck closely to my heels all afternoon until I did a sudden change of direction and fell over him. Big fun to break a collarbone on moving day.
Fun fact: you can't "armor" you collar bone by working out. So if you, as a martial artist who can handle a single brick break, are being attacked by a huge monster muscle Mook, just snap the collar bone.
You say that as though it were an entirely unsupported structure that is structurally liable to fracturing along a fine line and propped up in a way so as to promote such a fracture, as a brick is in the confidence building exercise - not a demonstration of ability but a method of overcoming certain mental obstacles - and not actually somewhat structurally resistant to flex, and that landing that blow would simply happen with ease and without opposition, and that you actually know what you are talking about as opposed to blowing your own fantastical horn. "Just" snap the collar bone of a maniac conditioned towards strength and aggression who intends you harm... Do this often, or just LARP with peers in a safe, padded environment with strict precautions in place? While it is true that that particular bone is one of the easiest to break and that breaking it might possibly cause someone maybe some hesitancy to continue their assault, anyone who is filling other peoples' heads with the nonsense idea that it is a simple thing to do in a live situation and that it even will necessarily end a conflict is, themselves, a fantasy dwelling f*****t responsible only for the design of those persons' error.
Load More Replies...Also, when you break your pelvis, it typically breaks in two places... Kind of like when you break a pretzel in half. I know from experience, unfortunately. Doctor, who was excellent and found the break unlike the emergency room staff, told me: "You broke your ass bone." Car wreck.
And then you've got the competitive cyclists who fall off their bikes, break their collar bones, then get back on their bikes and keep riding. Oof.
But that doesn't mean we should stop learning. On the contrary. There's plenty we can do as individuals and as a society to get a better understanding of ourselves and in turn, those around us. "Emotional education is sadly lacking in schools," Gorfinkel said. "We teach all kinds of useless things. And I hate to say it... They're not useless, but they're not as relative to us as understanding our emotional selves."
The doctor said there is precious little time devoted in schools to understanding emotions, such as anger, humiliation, shame, guilt, and what to do when we face them. Instead, they're often presented as something negative we need to control, as opposed to being contextualized. These emotions can actually help us, show us the path towards what needs to be done next. "They shine a light on how we need to manage our lives better," Gorfinkel explained.
"That is something that has long bothered me. Emotional education is, for the most part, not focused on; we focus on physical education, we focus on [general] education [like] mathematics, physics, chemistry, biochemistry, whatever it is, but a lot of the time, the most critical part that will determine our happiness, and our productivity is completely overlooked."
Because of that, we have to do it ourselves. "Just make the most of picking the low lying fruit," Gorfinkel said. "I'm talking about [things like] sleep or finding the right amount of stress in your life—stress is an interesting thing. Too little stress is actually bad for a person, there's a sweet spot when it comes to stress. And it's kind of a bell curve, right? That if you have too little, there's not enough stimulation. And a person does not approach self-actualization. Even though stress is roundly considered a negative thing, in fact, a little bit, just the right amount is a positive thing. Of course, it can turn into a very negative thing if there's too much. But finding the sweet spot of stress is probably the best tip that I could give."
When you think about it, the Internet is a beautiful thing. One moment, u/Zenssei is chilling in front of their TV, the next, tens of thousands of people are teaching one another about the human body. More of this, please.
Our brains make up, on average, around 2% of our body weight but consume 20% of our caloric intake
I would like my brain to take up more calories at times... especially during exams or work presentations
And while trying to loose weight. Common brain - do your part
Load More Replies...Wish my brain took most of my calories, maybe it would make my brain bigger and smarter instead of my a**e being fatter and jiggly lol.
OMG! You are HILARIOUS!!! I love your sense of humor:)
Load More Replies...Also, the energy has to be delivered to the brain by glucose in the blood. Only carbohydrates and proteins can be converted into glucose, not fat (energy from fat is used in the rest of the body, e.g.for muscle movement and generation of heat). If the required amount of glucose can't be covered from digestion, the body breaks down proteins from muscles to make up for the difference.
Is there a brain workout I can do? Too lazy to properly exercise the bod.
I learned this back in Bobby Fisher's day when it was revealed that a chess Grandmaster uses as much energy during a tournament match as an NFL player does during a game.
If only that meant eating more makes you smarter, but it does explain why missing breakfast always seems to cost me a few IQ points.
Your body will reduce your muscle strength to protect your spine. Stand on flat ground, hold your arms out in a t-pose, and have a friend push down on your hand while you try to hold it in place. That's your control, how strong you actually are. Now, remove 1 shoe (or put a book under 1 foot) and repeat with your hips askew so your spine isn't straight. An inch is all it takes. Your strength will be reduced to the point that your friend can use a single finger to push your hand down.
Also, go stand in a doorway and put your hands to your side. Now still keeping your arms straight push them both out against the door frame. (Palms face your legs though so the back of hand is pushing against the door frame). Do this for about 1 minute. Then step out of doorframe and watch your arms. They should automatically rise up from your side like your body is making the letter T. Anyone else know this trick from school when you were little? Such a fun thing to do with your kiddos.
Load More Replies...people always be underestimating how important your spine is - it protects the very important connection your brain has to your body: the spinal cord.
I think I'm having a brain fart, but: how does this experiment tie into protecting your spine?
I actually tried this with my friends and we got the same result except I had to use two fingers to push her arm down.
Alzheimer’s disease isn’t just gradual loss of memory. It physically exists in the brain. It’s a physical substance that attacks the brain. Like, if you were able to open the skull of a person suffering from Alzheimer’s disease to take a look at their brain, you would actually see this sticky, fibrous, grey physical matter overtaking their brain.
I've removed 1000's of brains post mortem from decedents that had an Alzheimers diagnosis while alive and I never noticed anything like what they're talking about. Unless they're talking about an effect on the pia/arachnoid/dura mater? ~~~~~~~ What I DID notice was that people who had Alzheimers had smoother brains than those that didn't have that diagnosis. The gyri and sulci of the brains (those wavy ridges(gyri) and furrows(sulci) that make the brain look bumpy) with Alzheimers were shallow and the surface was smoother, whereas those who didn't have Alzheimers had deep sulci and pronounced gyri. I had one decedent who had lived to 103, was independent and lived alone up to the last week of their life... that brain had incredibly pronounced sulci and gyri. The smoothing is visible on CT scans about a year into active Alzheimers. And none that had used medical marijuana had any differences that weren't obviously attributable to pre-mortem conditions.
Load More Replies...My grandmother had this awful disease. Watching her decline was the worst thing I’ve had to see, and when she passed it was a relief :( I hope one day we can get rid of it altogether..
Same with my aunt. She was the sweetest, kindest woman in her day. She, unfortunately, became very violent towards her last few years. Many issues with nurses & staff in her care centers...
Load More Replies......but what makes it even stranger is that you cannot nessesarily correlate the amount of damage of the brain visible on a CT scan with the performance of the victims. Some of them can have only very little "visible" evidence of Alzhaimer's in their brain, but still be really impaired while for others if you only saw the the scan you would say that brain cannot function, but apparently it does to a level where it is almost indistingueable from a healthy person. The brain is a very mysterious substance, and can be rather amazing at rewirering itself when sections of it becomes inoperative.
That's the easy part. The hard part is keeping them alive.
Load More Replies...I wonder if there is a way to remove it. Perhaps they are working on that?
They are. The difficulty is finding something that removes it without causing even greater damage to the brain itself. My dad is in a study for once such treatment.
Load More Replies...It really is. If there is one thing I admire my mother for, it was for visiting my Nana every week, and watching her decline. Bravest thing my mother has ever done. I don’t think she has ever recovered from losing her mother :(
Load More Replies...So if there’s physical proof 1) why can’t it help in early detection 2) why can’t it help in finding a cure?
1. By the time it shows up "early detection" is out the window. 2. It can, but finding a cure isn't a quick process. It could take centuries of research to make a tiny bit of progress.
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The eyeball is the fastest healing part on your body.
I got to find out in my first year of Art College. I’d torn the surface of my eye, probably while sleeping with my eyes open. The optometrist took a look a few hours after it happened, and said he could pretty much see it repairing itself while he watched through the magnifying lens.
Load More Replies...stomach mucosal layer. Sitting in a a pool of acid, every cell is replaced ~ 2 days.
Similar replacement rate for the outer layer of the eyes. And for the cells in the gut.
Load More Replies...which part of eyeball? The eyeball has 3 layers, and the deepest layer is hard to regenerate.
The post is almost certainly referring to scratches of the cornea. The outer 6 cell layers are apparently regularly replaced extremely fast. I absolutely agree with you, this post is terribly misleading. Only the outer protective layer heals quickly. Most parts of the eye heal very, very slowly or not at all. In fact, the eyes are one of the least regenerated parts in the whole body!
Load More Replies...The tongue heals pretty fast too. I still wouldn't recommend licking a knife
Load More Replies...I can confirm! After i made a surgery on my eyes i spent the first day crying my eyes out(its the healing process you can't help it). I had a lot of swelling and pain and i was begging my doctor to give me more painkiller drops for the next day! His answer was you won't need them tomorrow! It was true! The next day i was feeling almost fine with just some swelling! Five days later perfectly fine!
The stated fact in the post only applies to the outermost cell layer of the eye. Other parts of the eye actually heal extremely slowly or not at all. It's an extremely intricate organ.
Load More Replies...Why am I blind!!! not blind blind but sorta. Enough to need glasses for things 6 feet and further.
All mucous membranes (areas of your body that stay...moist-ugh, sorry-like the inside of your mouth, the inside of your nose, the biological female's vagina, and of course, your eyes) heal more quickly than anywhere else.
You will sooner die from lack of sleep than lack of food.
You can live, depending on your current body fat and health level, for months without food. Estimates are you that you will die for lack of sleep within 2 weeks
The people around me will die from my lack of food... I get seriously hangry.
Similar for me with lack of sleep. It’s a bigger danger to other people tbh 😂
Load More Replies...A short list of things we need and how long it takes to die without: 1 - Oxygen (5 minutes) 2 - Water (72 hours) 3 - Sleep (96 hours) 5 - Food (2 to 3 months)
Not true about the oxygen.... The longest time breath held is 24 min 37.36 sec, achieved by Budimir Šobat (Croatia), in Sisak, Croatia, on 27 March 2021. Don't even know how's that's possible but he did it! He goes into some sort of trans state it's crazy
Load More Replies...I love sleep, sleep makes me supremely happy. That is why I never understood why people humble brag about being able to run on 4 hours of sleep per night and not feel any negative affects. These same people then always seem to ask why they constantly get sick, gain weight easily, or constantly get stressed.
Useful slight underestimates: You can hold your breath for about 3 minutes, live without water for 3 days (as long as you don't do anything remotely strenuous), and go without food for 3 months. Fun Fact: When you die of hunger, it's because your body is eating itself to get calories!
Correct me if I’m wrong but, doesn’t the body just start going into microsleeps after a while so it would never get to the point of death? Similar to how you’d pee yourself before your bladder bursts or why you can’t just hold your breath until you die?
In most people yes, but fatal familial insomnia exists in a couple of families. Terrifying stuff.
Load More Replies...You can live 30 seconds without oxygen, 3 days without water and 3 weeks without food. When you are on a "starvation" diet, your body does NOT live off your stored fat, it begins to break down your muscles, heart, kidneys, liver, for the protein, then it moves to your stored fat. How do I know that? Research done on POWs, concentration camp survivors and people who survived the death camps. There is a huge amount of "research" on it. The Nazis "discovered" that the minimum caloric needs of a human being, lying in a bed and NOT moving was 900 calories a day. So when they "created" the Warsaw ghetto, they "established" the daily diet for the Jews at 1100 calories a day for workers and 800 for non-workers. Only the Nazis and the commies could figure out a way to starve people to death while "feeding them."
Well, I assume you can live for months without food, but that doesn't guarantee you'll be conscious for two months.
I had post-partum depression and anxiety so bad I didn't sleep for 6 wks.
The appendix is not a vestigial organ. It actually protects good bacteria in the gut. You can live without it, but it’s not just chillin’ in there
The spleen is also not an organ you should live without. It is a hyper immune organ. Surgeons who have had to have their spleen removed because of injury are "dissuaded" from performing surgery because they now harbor a great many biologic organisms that can be spread.
I thought the only purpose of the spleen was so Lightning McQueen could break it and make that rhyme.
Load More Replies...;-; I thought mine was just chillin in there but either way I don’t have mine anymore
I think this is debatable. It may be true that it can protect good bacterial, but it is the vestigial remnant of the hind-gut - a function it no longer performs.
A vestigial remnant that found new purpose. Good for it! You go appie!
Load More Replies...They thought my daughter had appendicitis but discovered it was completely healthy when they opened her up. Took it out any way. Pissed me off....it does have benefit to us!!!
It is good that medical science no longer sees any of our organs as vestigial or surplus and removes them instead of treating them.
It is actually a living archive of your gut microbiome. And because of it, if anything happens, your body can easily repopulate the good bacteria. This is why those who have their appendix taken out suffer from gastrointestinal issues as they get older.
Scars are not made of "permanent" tissue (they're held together by collagen) and are in a constant state of repair. This repair is facilitated by vitamin C (amongst other things). Yes, this means that people with scurvy (from vitamin C deficiency) will see all their old scars reopen into fresh wounds.
I've read many books about diseases and scurvy is one of the more bizarre and horrible. Ships used to begin voyages with twice as many sailors as needed on the assumption that half would die of scurvy en route.
Is this why applying vitamin C to skin and scars helps them to heal/improve? Hmm...time to research...
Ernest Shackleton's men experienced this firsthand in 1913 when they were shipwrecked in Antarctica--they ate their sled dogs and even penguins before being rescued, but had virtually no fruits or vegetables in their diets. Imagine their surprise when some decades-old injuries began to open up again! Incidentally, not a single man was lost on the expedition.
Oranges have the most vitamin C. The English navy originally gave them to sailors, but this proved too expensive so they switched to limes. This is why sailors were called Limeys. But limes actually contain very little Vitamin C.
Some women can feel the exact moment an egg is released from the ovary during ovulation. Feels like a little pop just on one side. Pretty neat
Or adenomyosis, endo’s less known but equally painful cousin
Load More Replies...A little pop? A little pop?!?! Try red hot iron rod poking your lower half. The pain is strong enough to make a grown woman cry in fetal position on the floor. ...Little pop my a$$.
Egg release for the other women: *le pop* :) eggo has been released. Egg release for you: 3...2...1 launch *equivalent of the explosion a rocket creates when it launches*
Load More Replies...Oh yes and when an egg that is fertilized beds itself in the womb can be felt too! I did for both my pergnancies.
Little pop my ass. It feels like someone is stabbing you in the side with a red-hot poker.
And I learned from binge watching Mama Doctor Jones on YouTube that that pain is called Mittelschmerz (no explanation on why they use the German word in English though)
Humans are one of a few species of mammal that oddly don't produce their own vitamin C due to lack of a certain enzyme. Other mammalian species who exhibit this mutation are those contained in the main primate suborder Haplorhinni (monkeys, apes, tarsiers), as well as bats, capybaras, and guinea pigs.
All other mammals produce vitamin C in the liver.
We still have the "broken" gene in our DNA (it's called a pseudogene). Since our ancestors had a diet high in vitamin C, an inability to produce it didn't cause issues, so this genetic defect was temporarily exempt from natural selection and by random chance became the dominant variant.
And if we produced our own Vitamin C, pirates couldn't yell "ye scurvy dogs" at anyone.
That's also why british sailors are called "Limey" - because they would eat limes for vitamin C so they don't get scurvy on long voyages
You can calm yourself down by splashing cold water on your face to trigger the mammalian diving reflex.
I think its something to do with slowing the heart rate/breathing down to preserve oxygen?
Load More Replies...Ah now i get it. So basically when someone is angry at you, just throw the glass of water or cocktail in their face, and they will calm right down. At least in the movies, it always seems to be 100% effective.
I can stop my anxiety attacks by putting an ice cube in my mouth. It’s probably the above effect, but it was explained to me that my flight or fight instinct was in overdrive and the body can’t do that and adjust to the abrupt coldness in my mouth. So it shifts focus over to the ice cube. Anxiety attack shut right down. Could be psychological, but I don’t care. It’s a lot better than popping a pill. For me, anyway. I’m not condemning medications, I just have adverse reactions to Xanax and such.
my mom used a damp washcloth to gently wipe our faces when we were having meltdowns and it worked the same way.
That is because it slows the heart rate. It was sometimes used as a home remedy for people with a racing heart back when medical care wasn’t as enhanced and available as it is nowadays in modern countries. Likewise, if you had a slow heart rate to begin with, it could lead to fainting. (Hopefully needless to say: don’t do any self-experimenting without a doctor‘s advice, especially if you have heart problems.)
Dying of lack of sleep in two weeks is a very rare condition called Fatal Familial Insomnia.
I actually use cold water in my face to wake myself up in the morning... it doesn't feel calming at all
maybe cuz when you dive your heart rate changes and you body tries to make you breathe less idk...
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You can grow a new human being faster than most missing toenails can grow back
Hmmm... lost a toenail in an accident, and it was back in about six months vs. nine months for preggers.
My wife will be so happy to hear this. She's an endurance/grizzly runner and, when I met her, she was super embarrassed about not having her big toenail in and missing two others. We met, have gotten engaged, gotten pregnant, and are about to have a baby, and that specific big toenail still hasn't fully regrown (though she does keep re-injuring it, but not as often as you'd think - It's just a slow grower!)
congrats on the pregnancy thoo!!! wish u the healthiest happiest baby ^^
Load More Replies...Also the Moon is slowly distancing itself from the Earth at the same rate toe/finger nails grow.
I have half a toe nail and been waiting for it to grow since the beginning of January
True. I got a pedicure the week before I got pregnant. I'm due end of the month and there's still a sliver of color on my big toes. It was so fascinating I didn't remove it at first... And now I can't reach! :)
If you carry a lot of unprocessed trauma, it can cause psychosomatic autoimmune diseases.
Note that "psychosomatic" does NOT mean "imaginary." It means that emotional trauma is translated into physical trauma.
Yes!!!! Asthma has this very real and dangerous characteristic
Load More Replies...This is what happened to me! Had undiagnosed and therefore untreated PTSD since I was 11 along with a whole load of emotional abuse for the next decade or so and ended up with ulcerative colitis. I got sick so quickly the dr's originally thought I had an aggressive bowel cancer and was going to die in the next few weeks. I'm 33 and still here. :)
good for you! i'm glad they figured out what was going on, and that you're okay now, that sounds incredibly awful
Load More Replies...TO BE CLEAR: Psychosomatic does not mean hypcohondriacal! Psychosomatic illnesses are real! A psychosomatic cancer is cancer! (In fact, the difficulty in talking in discussing psychosomatic illnesses is you can't determine that they're psychosomatic in origin... all your doctor knows is that you have cancer cells metastocizing through your body about ready to kill you.)
As someone who's field is oncology, I can't not do the 'well actually' thing when cancer is mentioned. The link between psychological issues and cancer has not been proven - there is some correlation, but the current thinking is that it's the behaviours that often come with mental stress that is causing the cancer, and not the stress itself. So the cancer probably isn't psychosomatic, but rather caused by the smoking/drinking/comfort eating/alternative coping mechanism.
Load More Replies...True. And some autoimmune diseases just exist and it's not psychosomatic (said for those who blame themselves enough for being sick already). Unprocessed trauma can also lead to everyday psychosomatic symptoms such as headaches, acid-reflux, nausea, or general aches and pains for example. More extreme are things like limb paralysis or even blindness (think it's called emotional trauma blindess or something).
My dad said that the worst thing you can do is "protect" children from "dirt." He told me, when our son was born, not to make anything sterile, that it would totally destroy the ability of his immune system to recognize what it should or should not attack. And this was fifty years or so ago. So, I never boiled his bottles, never sterilized his anything, and he has no allergies and he is the healthiest kid ever.
Yes, I have suffered from chronic hyperventilation for more than 10 years which causes dizziness every day of my life. I try and try with guided breathing etc, but nothing helps and I just want to breathe normal, like before the trauma.
Load More Replies...Aaand time to go to therapy, since autoimmune diseases run in my family already; I don’t need to cause my own.
Yup! Abusive x spouse caused my fibromyalgia (PTSD, trauma, anxiety and major depression disorder too)
X-rays of childrens mouths are nightmare fuel. The second set of teeth to replace baby teeth are already grown and lodged in their skulls. So you'll see two rows of teeth and its freaky looking. They don't grow in when the old ones fall out, they are already loaded in the chamber waiting to get launched.
I have seen this and I want to thank whoever posted this for not showing the picture of it.
Indeed. My daughter had an x-ray at 5. It was... disturbing, to say the least.
Load More Replies...Not just two actually... the teeth are kinda staggered because they're much larger than the jaw is ready for, so they're almost three rows. And yes, the jaw doesn't grow that much; many people's jaws NEVER grow enough to accommodate all those teeth, and that's why we get impacted wisdom teeth.
Are you thinking about how they look in the mouth when they grow out?
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The surface area of the lungs is about the same size as a tennis court
If you stretch out your small intestine perfectly straight, you will probably die.
Load More Replies...If you were to spread out your lungs across a tennis court they wouldn't work anymore..
And if you took all the blood vessels in your body and extended them end to end, you would die. (Jimmy Carr joke)
...yes? "Less than a milimetre" isn't really exceptional? The same goes for nails, hair, plant leaves, cloth, paper... And since cells are incredibly small, why would the body waste material to build what's essentially a filter membrane?
Load More Replies...Of a man's lung, womens for the most part are usually smaller, except in rare cases (like me lol)
If you say haaah your breath comes out warm,but when you say Woooh it comes out cold.
It's easier that testing the fact that the finger of a child below 11 will grow back if cut.
Load More Replies...This is because with a wooh sound, the air comes out with less volume but higher velocity, which mixes with the ambient room temperature air. Because it is faster too, just like a strong wind, it cools whatever it hits by moving heat from it. The haaah retains more body heat and is slower, so it doesn't steal heat from whatever it hits, unless that thing is warmer than body temperature.
Almost all of the first 39 were true. This is ridiculous. Your breath will always come out warm. It will be a little warmer if you say "haaah." But mostly it will FEEL warmer because it will come out more slowly and be both moister and move less air past your hand, both of which will evaporate less moisture. Evaporation takes enormous amounts of heat out of its environment.
i learned this in music class in fifth grade cause we were learning how to play the recorder
It's possible to pull a jaw muscle while yawning. I found this out the hard way at work one day.
It's possible to pull all sorts of muscles I only seem to have just so I can injure them
I understand your pain. I go through this all the time lol
Load More Replies...My mom and I can dislocate our jaws on purpose, it doesn't hurt in our case. Funny party trick.
The move to put it back is called the Hyppocrates move. So even the ancient Greek had that problem.
Load More Replies...You can also dislocate it while eating cereal. Don’t ask how, I don’t know how I managed.
Can speak from experience here. Several times in my life, I have gotten a cramp in the muscle in my lower jaw (between my lower teeth) from yawning too hard. It hurts like a m**********r.
Many times I have weak jaw muscles(weird-idk why) and it's hard to chew the easiest things, often...since my 30s.
Load More Replies...Been there, done that. I have even dislocated my jaw eating an apple.
Not just the jaw. Can't tell you how often I've yawned, and the muscle right under my chin (almost) goes pop. I can usually feel it start to happen, so I can stop it before it actually happens, but sometimes the yawn is so pronounced that the muscle pops when my jaw's open all the way. Not fun.
Your body must warm fluids before absorbing them, so drinking ice cold water to hydrate is only burning more energy, and you're not hydrating as quickly.
I have always assumed this, and choose ice water to burn more energy.
Also, on very hot days, if you chug cold water, your body thinks that your stomach is, for some reason, going into hyperthermia. It sends all available blood to that area to "warm it up". The brain goes into protect mode and keeps all vital organs going while shutting down what you don't need to survive. This is why you can pass out chugging cold water on a hot day.
I dunno, I want the science behind this. I also had a Chinese acupuncturist tell me because I drink cold water it causes heavier more crampy periods. WHAT??? I've been drinking room temp bottled water for months and don't see ANY difference. Take things like this with a very LARGE grain of salt...
Don't know why but lukewarm Fluids mostly make me feel nauseous. It's eiter cold or hot.
I used to work in a hospital that had a multicultural population. With Asian patients you learned very quickly, dont bring even room temperature water to them. It always had to be steaming hot. Many would bring their own free standing thermos containers so their loved one would always have hot water available at the bedside.
Cold drinks are also counterproductive when you sweat, because the body has to work harder to warm them up. The result: you get warmer and you sweat even more. Lukewarm drinks, such as peppermint tea, are better ... the peppermint also has a cooling effect.
That there is NOT 20 lbs of toxic poop in your body at any given time. But apparently a ton of people still believe all sorts of ads about some pill or another being able to flush some imaginary "toxins" out of your body like it's going to magically cure you of 20 years of terrible eating and exercise habits.
Well that's not strictly true - because of the shape of the lower intestine and colon, they never really empty fully. It's very rarely 20lbs worth (you would be extremely ill if that was the case) but there's certainly areas that don't fully clean and bad bacteria can build up there. These drinks and pills work by irritating the gut so badly that everything gets removed, including good bacteria so they are not a healthy option, but they do technically do what they claim.
The whole gut tube is not a static rigid pipe! It has rhythmic contractions called peristalsis that ensures ALL the content is circulated. It doesn't need to fully empty, but all content is passing through. If ANY content stagnates you get severe emergency diseases that warrant surgery, not a miracle colon cleanse.
Load More Replies...Just become a vegan that runs and you'll crap your brains out daily #me
Humans have kidneys and a liver to deal with 'toxins', cleanses are unnecessary unless the cleanse you need is dialysis
HOWEVER.... the walls of your intestines CAN be coated with "toxic poop" (it only takes several ounces) which can increase your risk of colorectal cancer, prevent absorption of beneficial nutrients, harm the helpful bacterial fauna in your stomach, and give you cravings for otherwise unhealthy food. The BEST thing to do is to eat a lot of fiber, as high-fiber stools act as wet sponges to gradually wash away the toxic poop. But oddly, an occasional bout of diarrhea will rinse it away, as anyone who has been told to drink citrate before a colonoscopy will know. (The idea is to rinse away the poop so the doctors can see the colon wall.)
Please don't give people the idea that they should get diarrhea to "cleanse their colon"... Folks, don't fall for "Facebook medicine" and mess up your gut flora!
Load More Replies...The body flushes it's own toxins out, we have an entire system for that. Of course we COULD give it an easier time by cutting out alcohol..
And fried food, beef fat, artificial sweeteners, ... Some of us need extra fiber.
Load More Replies...Well, excrement is toxic, unlike urine which leaves the body sterile; and being constipated is not good regardless how many pounds of waste there is in your body.
Urine being sterile is an old wives tale. Urine is only "sterile" in relative comparison to feces. After all, if your pee was literally sterile, how would UTIs exist...?
Load More Replies...Many people will do pretty much anything to instantly lose weight, no need for anything else. The vanity of the species is toxic as 20 pounds of extra poop.
why in the hell would anyone -- because people are stupid. Why'd I bother asking....
Well, excrement is toxic, unlike urine which leaves the body sterile; and it's not good to be constipated regardless how many pounds of waste there is in your body.
Apparently not everyone knows that women grow a new organ while pregnant. In addition to growing a child, they grow the placenta.
Only part of the placenta is grown by the mother. The rest is grown by the baby, as evidenced by father's DNA in it. Fascinating.
Yes! And apparently it's kind of a battle of DNA to both grow the placenta but to keep it at a reasonable size. The father's DNA is encoded to grow a huge placenta; the mother's DNA is encoded to suppress the size so that the mother's body won't be so affected/drained by the placenta. It's totally fascinating.
Load More Replies...I watched an interesting documentary once that consider a bady to be a parasite, controlling its host to get the things it needed to survive.
Some parents might argue that that behaviour continues well into adulthood.
Load More Replies...And sometimes the process that works to grow the placenta can happen in other blood vessels. I had it happen during my pregnancy. Luckily a quick cauterizing by a dermatologist fixed it. Even a tiny scratch and it would bleed like crazy! (It was on my shoulder blade, and it itched like crazy a lot, cue blood running down my back until a doctor told me what it was!)
I once asked a Doctor, what is the stuff that surrounds the fetus? His reply: The shooses.
Who doesn't know that??? It's not an organ, it's the lifeline of the baby.
No idea why you were downvoted for simply having a thought! Here's an upvote for you.
Load More Replies...The placenta is a fetal organ made up of its parenchyma, chorion, amnion, and umbilical cord.
39% of people have an extra bone in their knee. 100 years ago only 11% of people had this bone.
This is down to evolution. The extra bone is there to support the joint when kneeling to worship our masters (Bezos, Gates, Musk, Putin etc.) as they crush us economically and figuratively.
Ha! Take that evolution deniers! Now excuse me while I go pray to my Putin shrine.
Load More Replies...The bone in question is called fabella. It is a sesamoid bone, and as such it helps muscles and tendons glide smoother when you move. It is fairly unremarkable to look at. 1280px-Fab...rrow-1.jpg
This article says it might be for that, or might not have much of a function: https://www.the-scientist.com/news-opinion/tiny-knee-bone--once-lost-in-humans--is-making-a-comeback-65764
Load More Replies...I have them in both arms. Just call me monkey boy, lol.
Load More Replies...Some of us in my family have an extra bone in our feet near the inside of our ankles. We have 2 ankle bumps. I always thought it was normal. It helps give us a very high arch in our foot. One of my children has this, but the other one doesn't and had to have surgery to correct very flat feet.
I have that. No wonder I've always had extra high arches!
Load More Replies...I don't know where they get these statistics from, but I am a ARRT CERTIFIED RADIOLOGY TECHNOLOGIST and in a career that Probably includes 2000 x-rays that includes the knee and I ve seen exactly 5 people with it.
Evolution doesn't work like that. Structures may serve a function, but evolutionary adaptations, mutations and so forth don't form for the purpose of serving a function. They are results of changes. Originally, bones form from membranes and cartilages. Their growth is stimulated and induced by hormonal situations, nutrition, activity and physical stress, among other causes. In this case it looks like a common site of calcification within a tendon (joining muscle to bone). Probably results from some common change in circumstances - could be a common dietary/nutrition circumstance, behavioural or something else. If I were to guess it might here indicate some change in activity or tendancy that is creating a point of stress or friction. Body tries to heal, calcium and other substances resulting in bone builds up, bone forms. So, it is probable that friction or pressure is stimulating bone growth. It might even have the extra advantage of improving strength in that area and resulting in less injury, but an advantage doesn't need to be involved for changes to occur. Changes occur, regardless of benefit. Sometimes they also present a benefit, though sometimes they present a hindrance, and sometimes they remove or negate a benefit. The body, the universe, is full of imperfections. Imperfection is not just something that is attributable to personalities. It is a fundamental fact of nature. And one way to look at physical reality, an impressive interpretation, is that it might be considered surprising that it results in anything at all despite the fact that it is in some regard reducible to an elaborate arrangement of imperfections. But then if you think deeply enough about it and you consider perfection, purity, stability, then of course nothing ever could result from that. That notion lends only to a constant, changeless state. So imperfection, as counter-intuitive as it seems, is the most important thing to physical existence, because without imperfection then even in the case where something did somehow exist it could be nothing more than a bland and lifeless diorama and would never allow even for any witness or participant.
Load More Replies...I was curious about this, so I looked it up. It's called the fabella, and it may be the result of increasing body height and weight due to access to good nutrition. Down side: it also seems to increase the chances of osteoarthritis.
Yep have this, sesamoid bones in foot not right (one of each taken out), gall bladder was upside down and backward, and others. My family makes medical books all the time LOL
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Your brain continues to try to revive the body long after the heart has stopped. In some cases 30 hours later there has been found brain activity trying to make repairs to bring the body back. This is used to indicate time of death in murder victims.
How could a brain deprived of oxygen and glucose for so long function on any level?
Yeah. I'll be needing a source before I believe a 'fact' like this one.
Load More Replies...Not true. There is no post mortem interval measured from the brain. One of the reasons you "die" is because the brain activity ceases first. I want a source for this bull.
I love Bored Panda, but WHY don't the writers know how to spell/use correct grammar? If you're a "journalist," you should at LEAST read your post/article and look for any errors before you post.
They're not journalists. They copy and paste the posts from other sites complete with the original posters spelling and grammar mistakes. Click the link below the pictures to see where they get them from.
Load More Replies...I doubt this. With the right (read: sloppy) methods, you can "prove" brain activity even in a dead salmon: https://www.wired.com/2009/09/fmrisalmon/
I thought it was a cod. Must be a different experiment^^
Load More Replies...Calling BS on this one, 5 mins of oxygen deprivation almost always leads to brain death at room temperature.
The proportion of your vision that is actually in sharp focus roughly equates to the size of your thumbnail at arm's length. The rest of it is just your visual cortex filling in the blanks.
not sceitnifically accurate, or only accurate if you stare at just one point... Normally the pupil scans unnoticeable all the environment with rapid movements, also because otherwise the surroundings would be only black & white and not colorful. For the same reason the pupil can widen to perceive a bigger sharpness area
And the picture you "see" is actually upside down, and your brain turns it around
And the area covered by the optic nerve is blank, also filled in by the brain = https://novavision.com/we-all-have-it-the-blind-spot/
Stage magicians use the way the visual cortex of their audiences works to pull off sleight of hand tricks!
In children under 11 (for some reason), cutting off the fingertip from the last knuckle will result in complete regeneration of the finger in 100% of cases, assuming the naibed is intact. There's no explanation for why this happens, why it only happens to children under 11 and why it can't be sequences to fully regenerate / grow organs. It also occurs in many animals, as observed in test rodents. I learned that in science class in grade 8 and my dad called me a liar. I showed him my science textbook and he threw it away and said it was fake.
I'm sorry that your father did not believe your or your science textbook. Is he a flat-earther as well? I had to ask.
While OP's father reacted badly and not like a parent (or any adult) should, the fact as stated is definitely not correct. The fingertip cannot be removed from the last knuckle without removing the entire nailbed. If the nailbed must stay intact and attached to the body, this can only refer to a portion of the fingertip with only very little of the bone. Science text books for schools aren't a good source for things like this.
Load More Replies...How do you cut of a fingertip, but leave the nailbed intact? That means you just slice some 'meat' of the fingerprint part. Of course that grows back.
Yes, cutting off the fingertip at the knuckle but leaving the nailbed is impossible. I'm guessing OP meant cutting off the tip of the finger including the tip of the bone? That MIGHT be possible to do without damaging the nailbed but still would only nick a tiny sliver of bone, I reckon. And I could imagine that in adults, it would keep the cut-off look and not regenerate to be as round and filled-out as it was before. But even than this amount of regeneration is not near as impressive as OP makes it sound, and doesn't even come close to regenerating an entire organ.
Load More Replies...Poorly worded. You can't cut off a fingertip and leave the nail bed intact. You can cut off a chunk of the fingertip though, and that chunk will grow back assuming the kiddo hasn't gone through puberty.
I just shaved of a tiny bit of the side of my thumb nail and a large chunk of skin and it bled like crazy for hours.... but it really did heal well on it's own and zero scar now.
Load More Replies...I'm calling BS on this one. My daughter received such an injury when she was about 1 and a half years old. It my first day back at work. My then husband was supposed to be watching the kids. Her 3 year old brother got on the exercise bike. She was standing beside it holding onto the chain. He pedaled and the top of her finger came off. Nail bed intact. My X rushed her to the hospital with the tip in ice. The Dr's reattach it but told us the majority of such injuries do not take. Her's did partially. Still missing muscle tissue above the bone. Has just skin over it.
I know a surgical nurse who lost her fingertip at 6 years old, to an axe her brother was wielding around carelessly. It never grew back. It's just a smooth partial knuckle that originally still had some nail bed, but the nail surface sloughed off before she was 7 years old. So, not 100% of the time!
Load More Replies...It happened to me! My finger was cut off when I was three months old just above the quick of the nail. They tried to sow it back on, but it did not take and fell off and died. About 90% of it grew back and my ring finger on my left hand is only about 3 mm shorter than on my right hand.
I wonder who found out about it. And how and why? How many children had this happen to them? Was there a study (can't imagine)? HOW did they find out???
Kids have had bits chopped off for a long time. Plenty of cases.
Load More Replies...Not possible to cut off the figertip from the last knuckle while leaving the nail bed intact!
You can live "normally" with half your brain. In some severe drug resistant epileptic syndrom in young kids, the only option to stop the seizures is to remove a complete brain hemisphere.
After a while, with proper reeducation and all, the children can go on to have a normal life without cognitive deficit. They will have a limping, blindness from one eye and a very weark arm but can lead a normal life and not end up cognitively impaired.
One of the earliest sign of alzheimer's disease, before the memory loss, could be the loss of the sense of smell. It's also the case with Parkinson disease.
Our brain looks wrinkled because it is actually "folded" inside our skull in order to fit a maximum of surface and thus neurons & cell communications. Some animals like rodents have a completely smooth brain.
This fascinated me at uni. Google Roger Sperry and split brain theory. It's pretty amazing stuff..
I've seen some pretty amazing docos on neuroplasticity and training new neurological pathways. My granddaughters dad had a car crash and has a brain injury. He was able to relearn alot of functions through neuroplasticity, so it peaked my interest and learned so much about the brain.
Load More Replies...A few years ago, a 44 year-old man with no symptoms of brain deficiency whatsoever found out that 90% of his skull was filled by cerebrospinal fluid, his actual brain only occupying the 10% of space left. Studies concluded that human brain is so adaptive it still finds a way to operate quite normally with an extremely reduced size.
If you find this interesting, I highly recommend Oliver Sacks. A neurologist and also a talented writer who tells empathic tales of his patients, about the wonder of our nervous systems and also about human resilience in the face of horrible diseases and impairment.
Great. Lost my sense of smell five years ago (at 45). Guess I'm doomed.
Have you seen the pictures of that man who has half a head . He had an accident or something, but goodness it does look freaky
My aint had this. She was the first in my country to have this procedure done and the docter always called her "his miracle patient" cause they removed the part that was responsible for talking, hearing, walking, seeing,..... And she did it all
Its the same with a sttoke. Who recovers well is not always determined by the damage evident in scans. When my dad had his it was a blockage of the middle cerebral artery. He should have died. His willpower was amazing and he made it back further than anyone thought he could. Early rehab! Start right away. Studies have found that the sooner it gets started the better the brain starts new pathways. Years down the road he had a head CT that showed so much damage from strokes all over the brain that the neurologist couldn't understand how he was even alive much less functioning at the level he was. Up around, could do activites of daily living, make breakfast and lunch, go for walks, but never alone. And a stroke was not cause of death like expected it would be.
There was something about a Baby being born with a very small brain or something. Can't remember exactly. The thing is: the brain got bigger and bigger after living with their parents. Theory was that love and affection made it grow. I wish I could remember it better. It was fascinating.
Every minute you shed over 30,000 dead skin cells off your body
The skin is completely renewed about every 4 weeks. The outer layer consists of dead cells which is shed off from everyday friction and protects the living tissue underneath. The skin renewal is the reason why skin cancer is so frequent - the constant cell division requires constant genome replication, which increases the chance for malicious mutations. The frequency of specific cancers roughly corresponds to the frequencies at which the organs are renewed, with the exception of lung cancer which wouldn't be near as frequent if it weren't for smoking.
Makes me want to find a way to sleep standing up. The thought of getting into bed at night with my sheets and mattress just collecting skin cells and the material of the mattress holds on to them. Gross! I'm going to have trouble sleeping tonight.
A really obvious way to see your shed skin cells? Had a water bed so the skin cells didn't have anything to seep into. They just worked their way through sheets and mattress pad to gather in soft drifts on the impervious water bed below. When I was 18 I though it was a soft body powder someone had spilled, or a conditioner powder for the mattress.
The reason it feels weird when you or someone touches the inside of your belly button is because the nerves actually go to your spinal cord. These nerves lie at the same level that relay signals to your urethra and bladder. So when you feel like you have to pee when you touch the inside of your belly button, that's why.
I can't take it. That's why I don't wear elastic in my pants. Can't stand it against my belly button!
The professional term for this feeling is called the heebie-jeebies
it doesn't feel weird to me, it just feels like there is a finger on that part of my body
this has never happened to me… is it normal for that to happen?
Technically, all of one's nerves go to/come directly from either your spinal cord or your brain (with some exception of autonomic/visceral nerves that relay in nervous ganglia). It's incredible how long axons (extension of neurons that make up most of our nerves) can grow to reach a target like a toe. Look up the sciatic nerve or the vagus nerve if you're curious. But I get what OP wanted to say here, just wanted to add some more fascinating details.
This is a very useful hack if you're about to go on a long drive but don't desperately need to pee. Push the belly button and wiggle it hard, automatically gets rid of whatever is in your bladder so you won't need it again as soon
......automaticaly, where does "whatever" is in my bladder go, Jo87??? What else is there in the bladder besides urine? Please explain.
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You can poop out of your mouth if your intestines get backed up enough. It's like vomit, doesn't look like actual poop per se, but it's still disgusting.
I'm an anesthesiologist. It can happen with any bowel obstruction, but it looks like poop when it's the large intestine that's obstructed. It smells like poop and looks like diarrhea if it's been too long.
Load More Replies...This happened to my poor Labrador. She ate a small pine cone it got trapped in her intestine she threw up poop. Our vet operated. She's happy and healthy.
i had a lot of digestive issues as a kid and i swear no one believes me when i tell them that the doctor looked at probably 8yr old me and said "if you dont start having bowl movements you are literally going to be throwing up s**t" 🤐 needless to say i got the s**t scared outta me
I remember Jamie Oliver talking about this when he was doing his campaign for healthy school meals. He had known kids that this happened to because their diet was so poor (specifically severe lack of fibre, IIRC). He got a lot of hate for being 'preachy', but he wasn't wrong.
I used to be a nurse and I can confirm that this does happen. It is the most unnerving thing to see. I won't describe it because there's a lot of Pandas that would be running to the bathroom. But it is one thing that will produce anxiety in us because we feel so badly for the patient and gee we do not even want to contemplate the taste. ( I know that's pretty gross, but it is what we're thinking.🤢) You find out by either witnessing it or horror of horrors you yourself experience it.
Brings new meaning when you tell someone their breath smells like sh*t.
Only fair when you consider how many people talk out of their a$$.
Humans have stripes, we just normally can’t see them. They’re called Blaschko’s lines and form along the paths of embryonic cell migration. The stripes are sort of U-shaped down our front, V-shaped on our back, wavy on the head and face and we have basic, simple stripes on our extremities.
The body grows by producing more cells via cell division, which requires the complete replication of the genome for every single division. Mutations during replications are rare but they DO happen - and if they do, they let you see the "relatedness" of cells in the body, because the mutation is inherited to all descendants of that cell. The Blachko's lines are basically a pattern of cell relatedness - cells in the same line are closer related to each other than to cells outside the line. The lines become visible if the cell that started the line had a mutation - e.g. a variation in ski pigmentation.
There’s actually four linear patterns... Langer lines, dermatomes, Blaschko lines and exogenous patterns. Dermatomes are very helpful in describing fibromyalgia pain.
I wonder, have there ever been cases of a mutation where the stripes actually showed on a person?
There is a mutation that makes the stripes visual. I believe it's called incontinentia pigmenti, though I may be mistaken on that.
Load More Replies...Each one of your eyes has a blind spot where the optic nerve exit your eye into your brain. You can't see it because your brain tricks you not to see, it covers the spot with some made up image of what it thinks fits better with the rest of it.
Dear person reading this. You can see your nose. You are now in manual blinking mode. You are now in manual breathing mode. You're welcome.
Also, if you shift your visual focus quickly, you might notice a microsecond of blindness. Your brain creates it to keep you from feeling vertigo.
You can find it by holding your right arm straight out, and placing your thumb over something in the distance. Now close your left eye, and focus with your right eye on the spot behind the thumb. Then move the arm very slowly to the right, don't follow it with your eye, keep looking forward at the spot. Soon, not far from your focus, your thumb will look invisible. It's your brain covering up what it can't see. It's really freaky but interesting. Works with left arm - right eye closed - move arm left - too, of course.
I always notice it when trying to look directly at a star that is not very bright. It disappears completely. Noticed it first when I was a child, then learned the reason for it in school.
Load More Replies...I just found out I have a retinal detachment in my right eye so all I see is light and colors in it. Im supposed to see an eye specialist to schedule surgery but I have a severe phobia about eyes.
You can "see" your blind spot by looking at the stars at night. If you look at a medium dim star and try to focus on it, it will disappear. Look slightly to one side and it will reappear. It's kind of annoying.
Loon at the ceiling in you office (or so) with both eyes open. Focus on a lamp or sprinkler. Keep one eye open and close the other. You can make a nearby lamp or seco s sprinkler disappear but ceiling and other areas aroumd are still visible. Also works with stars at night. (It takes a few tries to succeed so the blind spot is just over the swcond item but works with some practice)
I was born with a problem with one eye, my brain didn't learn how to use this eye properly and mostly ignores what I see with it, but if I close my other eye I can use it and can in fact see the blind spot, I was an adult before I realised other people don't see this even though I don't see it with my working eye. Just never really thought about it
We're the best marathon runners in the animal kingdom and can win a marathon against any animal out there.
AND - that's why we pair with dogs so well, because they're marathon runners also, so we could hunt prey together by wearing it down over time rather than catching it in a sprint or a super quick movement the way many animals do - alligators, bears, birds, snakes, spiders, oh, and obviously... cats ;). That's true!
Running cross country with a dog has been some of my most pleasant experiences but even with a dog you have to stop every couple of miles to let him rest, pant and pee on the occasional bush.
Load More Replies...Many seems to get this wrong, its not about speed, its about distance over time. Hunters dont outrun horse but the horse will tire sooner than the hunter chasing it. This it due to being bipedal which saves some 15% of energy compated to qudrupedals and the ability to sweat removes excess body heat efficiently.
Also our muscles developed to be more energy efficient, while not being as strong they work longer times
Load More Replies...Don't worry mate, your marathon powers will protect you from that hungry lion or angry bear. You just have to stay in front of it until it gets tired. Most useless super-power ever!
I guess it's better for trailing prey rather than fleeing predators
Load More Replies...This is why dinosaurs should be so terrifying. As reptiles evolved, round one went to the mammal side of the family, which developed jaw muscles which could move the jaw side-to-side, allowing for eating quickly. (Ever read an old dinosaur book and wonder what the big deal was with how many holes are in the skulls? Turns out, this is the giveaway to having the right jaw musles. But then dinosaurs evolved hips which allowed them to run basically on their back feet. (Notice how much larger the back legs of most dinosaurs, even quadropeds, are.) Dinosaurs could now outrun mammals because they were functionally bipedal. Running on all fours limits breathing because both sets of limbs are now in front of the ribs! But because mammals could now eat food faster and therefore regulate their temperature better, they could be smaller (higher surface-area to volume ratio) and nocturnal. So when the dinosaurs went extinnct, mammals replaced them.
They theorised that we lost our fur and is able to sweat as one of only a few speices, so we could hunt other animals to exhaustion without overheating ourself. However we still has hair at the loction of our body that regularly comes in contact with outher bodyparts (cratch and armipits), to provide padding and ventilation in order to void skin damage due to it rubbing against itself.
Even a pronghorn antelope? They're only second to cheetahs in speed and they're endurance runners.
The average adult has 22 square feet of skin. Perfect size for a nice rug.
Literally was just gonna post that!! Great minds and all that
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Human eggs are small but big enough to be visible to the human eye
That stockphoto does not really fir though...it is by far not as big as a chicken egg...
If the inside are of the "O" of "In God We Trust" on a US dime were an egg white, the human egg would be the size of the yolk.
We're born with about a million. A lot of them die off, but we're still left with thousands. But we only actually ovulate about 400.
Load More Replies...You can actually see them with naked eyes. https://www.reddit.com/r/Damnthatsinteresting/comments/ndmz1p/that_little_white_speck_is_a_human_egg_next_to_a/?utm_medium=android_app&utm_source=share
I've heard this too, that human eggs are roughly the size of a period (ironically) at the end of a printed sentence in a book.
That's why some women can feel the release of an egg during ovulation. It's not microscopic.)
Baby don’t get knee caps until 2-6 years old
Try crawling on your hands & knees. Uncomfortable, right? Maybe even painful? Before they can walk, babies have to crawl & young children fall on their knees a lot. Having no kneecaps means the ground is always cushioned. (Though, in reality, they do have kneecaps, just not hard bony ones like us.)
Which explains why they can crawl on a hard floor without screaming in pain.
Orthopaedic surgeon here. This is wrong. All babies are born with kneecaps (every bone is present at birth); only they are fully made of cartilage. That’s why they don’t show up on x-rays and why they are hard to feel inside the tendon who is about the same consistency.
Wrong. They do have them. However, because they lack calcium and haven’t ossified (turned into bone) they can’t be seen on x ray/CT.
"Human children do not get knee caps until they are 2-6 years old." (I fixed it...)
They also have a lot more bones--the bones fuse together as they grow.
Your brain likes stimulation, if it doesn't get any it will make some up, some people are more sucepticle to it then others, the colors you see before you fall asleep are a common mild occurrence, there are several classes of these hallucinations, closed-eye visuals, which are caused by leaving your eyes closed for a long time, hypnagogia, which is caused by the onset of sleep, prisoners cinema, which is caused by looking into a dark place for a long time, ganzfeld effect, which is caused by blocking out all external stimuli, and Charles bonnet syndrome, caused by sight loss. Most are these are simple phosphenes but some can be whole imagined scenes, or more abstract fractal-like imagery
I get the fractal imagery. It is very pretty. Box that I know it is because my brain is bored, I will try to stimulate it more.
I get the fractals too. However, if I'm awake with my eyes closed for long, the fractals will begin resolving into recognizable images, usually humanoid figures. (Years on the night shift gave me permanent sleep issues.)
Load More Replies...I used to do this on purpose as a little kid. I'd swing on the swings with my eyes closed and just wait for the pretty kaleidoscope patterns to show up. Perfect activity for tiny introverts.
ADHD is caused by under-stimulation in the brain, and some of the accompanying behaviors of ADHD are often a result of the patient trying to create enough stimulation to be able to function properly. That's why stimulants are prescribed, despite seeming counterintuitive.
You can test it out yourself. At night, grab a mirror, turn the lights off and just stare at your reflection in the dark. Your brain will start doing horror movie crap to entertain itself.
Load More Replies...I was born with hydrocephalus, a pretty serious neurologic disorder. Had my first brain surgery at three weeks old. The doctors weren't sure what my intellectual/academic outlook would be--they told my parents I might never walk, talk, or go to school. However, they also encouraged my parents to try to stimulate me as much as they could. I was speaking in complete sentences by 18 mos, could read by 3 yo, and tested at genius-level IQ at 4 yo. My parents read to me a lot, and from an early age turned me on to things like jigsaw puzzles, crosswords, and logic problems to keep me intellectually stimulated. There's a lot they got wrong as parents (another story for another time), but I do have them (and my doctors) to thank for how well I ultimately turned out. My parents were told when I was born that it was unlikely I'd make it to my teens. I have a college degree, and I turned 50 in January. Seventeen brain surgeries later, I'm still here.
When you have a bowel movement, your heart rhythm shifts temporarily due to a vagus response. The reason Elvis died on the toilet was because his heart was beating 200+ bpm and the quick rhythm change caused a myocardial infarction. People with low heart rates have been known to pass out on the toilet because their bodies can't handle the shift. It's also why EMTs will absolutely not let you use the bathroom before getting on the ambulance. Especially if the bathroom is a standard 5'x8'.
What do the dimensions of the bathroom have to do with poop-based heart attacks?
Because they don't want to have to drag your limp ass out of a closet sized space before having to go to work on you.
Load More Replies...If you have irregular heartbeat and it is becoming painful, performing the action of forcefully pushing out can reset the beat to normal. This came right from 2 of my cardiologists.
Yup, if you’re having an episode of tachycardia, mimicking the push of a bowel movement can help regulate the heart beat!
Load More Replies...Elvis died while pooping? I'm not sure I needed this bit of information.
Elvis also had a mega colon so he had a very large amount of turd backed up and was trying to force it out which then elevated his heart rate even higher still.
Wait. Wait. I know a guy who always falls asleep after he poops. Is this why??? His blood pressure drops and he gets sleepy???
I don't think people usually have set times to get on an ambulance, nor would they think 'oops, got a ride scheduled in an hour, better not drop the kids off at the pool'.
Jaw muscles are the strongest in the human body
apparently you can bite your finger off like a carrot but your brain prevents you from doing it.
Glad to see the brain is making good use of the 20% of our calorific intakes!
Load More Replies...That seems to be a trend in animals in general...pit bulls, bears, etc?
This why we teach women to use biting as a tactical response in self defense classes. Bite anywhere and as often as you can as hard as you can. Hands, fingers, face, ears, nose, especially soft tissues like the soft spot between a persons thumb and index finger. It's soft and loaded with nerves. Guaranteed to make the strongest person scream and wince.
It only takes about 15 pounds of force to rip off a human ear
I feel like this wisdom was learned the hard way!
Load More Replies...One of my teachers in high school once told us something slightly disturbing but also kind of useful to know. Apparently a great way to get rid of a person (who is stronger than you) who tries to rape you, is by ripping their ear off and throwing it as far away as possible. Getting one arm free is often possible when being attacked (even when e.g. someone is laying on top of you). Under adrenalin it's really easy to rip an ear off. It hurts af. NO ONE will not go looking for their ear which gives you time to run away. It can be reattached realatively easily (so you don't have to feel bad).
Good to know for sure, but I think one common problem with self defence techniques is that some people freeze as a response in such cases, and are unable to apply any of it. It's also why the stigma of "well, why didn't you fight off your rapist, if it was rape?" sounds horrible. I remember reading that people who were abused as children are particularly prone to freeze/go limp during rape/sexual assaults. Note: thank you for sharing this; what I've said is not meant to seem that I'm against teaching self defence!
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Synovial joint fluid is the most frictionless stuff on the planet (unless they've synthetic'ed something up that recently.)
Is this the stuff people thought others were trying to steal from them?
That’s Adrenochrome, if you’re talking about conspiracy nuts. If not that, is there something else ppl thinking everyone wants? Oh no?,
Load More Replies...frictionless movement =/= frictionless fluid. A frictionless fluid would be a superfluid, meaning zero viscosity - i.e. something super thin and runny that leaks everywhere and would definitely NOT stay within the joints but get squeezed out instantly (no friction = doesn't stick to anything). It would be totally useless as lubrication. Also, friction/viscosity is partly determined by the shape of the molecules; bulky, unevenly-shaped molecules have more friction and stick together more easily than small and round ones (imagine tipping a container of rusty nails vs. tipping a container of glass beads). Synovial fluid contains several larger biological molecules and for that reason alone could never be as frictionless as any type of molten element.
Somewhere in the grim darkness of the far future, filthy xenos are harvesting humans for lubricants.
That's wrong, liquid helium is a superfluid and does not respond to any friction.
I think they're doing something..with chickens, my husband had it done..Rooster Comb Injections contain hyaluronic acid (Hyaluronan) and are injected into the knee joint to provide lubrication and relief from osteoarthritis symptoms. The treatment method is also known as viscosupplementation.
No longer using chicken goop, too many were allergic. Now it is man made
Load More Replies...30% of body waste is excreted via skin
My guess would sebum, it's what keeps your skin from drying out.
Load More Replies...Our skin is a fully fledged organ - the largest organ we have. It has so many functions, that it's actually amazing how complex it is.
I'm just digging the fact that there are a lot of smart comments on this particular panda. It's been fun to read.
If you faint at the sight of your own blood you may have an oversensitive vasovagal response. The theory is that this developed as a survival mechanism, kind of like an opposum playing dead.
My mom is a nurse and she met a doctor that was scared of seeing his own blood.
It sucks being this. I can handle the blood anywhere on my body, except my fingers and feet. Weird. I have graves disease, super fast metabolism, and for a few years I was constantly adrenalised, my body was always in fight or flight mode, I can't even describe how sick it makes you. So when I had a shock, however small, on my fingers or toes, and I'm talking even pin pricks, my body would react with fainting and then the overstimulation on the adrenal system would send me into seizures and my body would cook and have to artificially cooled. Always a drama. I'm really careful with knives and although I'm always barefoot I'm very mindful of what's Infront of me.
Did you choose not to medicate your Graves? I got my thyroid ablated with radiation to knock back its overactivity. Of course, I immediately went hypo-thyroid, so am on meds for that for life -- but there's a pretty high chance of heart attack with Graves.
Load More Replies...i only have it happen if it's coming from somewhere it's not supposed to be, in reasonable quantities. i don't pass out from a cat scratch, but if i accidentally stab myself or step on a piece of glass you bet i'm hitting the floor.
Load More Replies...Apparently it is more frequent in women in their fertile years as an evolutionary adaptation to interhuman conflicts since harp weapons began to be used. It supposedly increased their chances of survival by making them seem harmless or unable to be spotted. Another expl- in case of blood loosing wounds mother nature wanted us ti fall in order to position the head at the same level with our bodies, so it wouln't be deprived of blood (oxigen).
My 21 year old son really suffers this so badly, bless him. He faints and has to lie down for 10 min afterwards, as he goes into shock . He has always been the same , even now with getting the jab ... Horrible thing it is .
Me! I could do emergency first aid on YOU, no problem. But my OWN blood? POOF!
No. I faint when I see my own blood from a cut or nosebleed, but not from my period.
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When you get conditioned to physical activity, your circulatory system adapts -- more blood, more vessels, more blood cells. But your lungs really don't. This is because no matter how much blood your heart is able to deliver to your lungs, the lungs still have no problem oxygenating it. This is why your oxygen saturation doesn't drop during exercise (unless you have a heart defect.)
Had a lung collapse during a biopsy, had 98% oxygen from one lung. I used to swim and would always see how long I could hold my breath. My lungs are "huge" according to xray techs LOL
Babys can break their collarbone during delivery. It happens quite often, but heals quickly. My teacher told me that (if it happened to you ofc) you may feel a slightly higher spot on your collarbone, called the callus where the fracture grew back together.
I have a bump on both of my collar bones, about 2 inches away from my shoulder. Only noticed once once I lost 150 lbs. and could see them again. But I didn't notice them until I started using a LV backpack for my everyday handbag because the straps hurt those bumps.
There's a "right" and a "wrong" way to swallow and the first swallow pattern you learn isn't the right one! Babies swallow by pushing their whole tongue forward (since it's better for nursing). However, as you transition to solid foods, you are supposed to change to a swallow where you put the tip of your tongue on the roof of your mouth and roll the food back. Not everyone does, and those that don't are more likely to choke, eat too fast, develop dental problems, and some develop a lisp or distorted sounds as they learn to talk!
I tried swallowing by pushing my whole tongue forward, it was uncomfortable and i suddenly felt my mouth is full with my tongue lol.
Well, I now know why I have a lisp! But I was also born with an extra bone under my tongue (called an Eifel tower normally), that I got removed so it could help me with speaking, swallowing and breathing.
I knew there was a wrong way to swallow before I read the text. I usually notice that when I try to drown my self with my tea. Tea in the lungs are definatly not the correct way to ingest that
I just tried to do it the wrong way and my body literally wouldn't let me.
And, as another fact, people who have had a stroke often have to relearn how to swallow, and it's not an easy process when you've lost a lot of muscle control.
It is simply impossible to laugh after tickling yourself, since the cerebellum sends commands to other parts of the brain to ignore these actions.
But are you........................tickled by it?
Load More Replies...Guilty! But laughed only with your comment and not with the tickle
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In theory humans could breathe a liquid if it was super saturated with oxygen. It wouldn't be easy because the density of liquid being so much higher than air so after 15 mins or so you would be too fatigued to continue breathing.
The hardest part is getting all the liquid out of the lungs so the person doesn't get pneumonia
So this has been used to keep premature babies alive who lack fully developed lungs - perflubron (https://en.wikipedia.org/wiki/Liquid_breathing). Also worked helping cardiac victims. But since we can now do oxygen enemas to increase O2 sats, meh..
Doctors have actually used oxygen saturated fluid in the lungs of premature babies, to help them survive. Because their lungs aren't fully developed yet, and they are, of course, used to being filled with fluid, as they are in utero, it's less traumatizing to those little lungs, than trying to breathe actual air. At least for a short time. I don't think the method is widely used. But it has saved a few babies' lives.
James Cameron was inspired by real world military test, see: https://en.wikipedia.org/wiki/Liquid_breathing
Your stomach is surrounded by more brain cells (half a billion neurons) than the brain of a cat contains in total.
It's your enteric nervous system. It controls digestion, operates autonomously, has its own memory, can handle its own reflexes, it has its own senses even.
It's thought to have come about because of the blood-brain barrier and the main brain being locked away in the skull, a spinal column and nerves away from the critical action of nutrition.
I recently heard than, in symbiosis with your gut microbiom, these brain cells constitute a second "brain" and we're far away from understanding its whole potential, in particular in preventing autoimmune diseases. The future is crap...
You also have some taste receptors in your stomach, to detect sweet substances and get the insulin ramped up -- your brain never "tastes" these.
but I suppose this is true to most animals if they all digest and stuff
Apparently about 20% of people have a bony ridge on the roof of their mouth. Most people's pallettes are smooth with a very slight ridge. The 20% like me have an exaggerated and more pronounced ridge. Apparently it's most common in women and Asian folk, and I'm neither so that's neat. I always thought it was totally normal.
Ha! Mind's got an extremely high arch and rows if parralell ridges. It's genetic.
High arch is caused when your tongue did not develop proper position in your mouth.
Load More Replies...OMG! I always thought my ridged palate was the norm! I’ve never had a dentist comment otherwise. 🤯
All people have palatal rugae, this post is about a ridge behind it (that you might also have)
Load More Replies...The part of my pallet just above my gums and teeth has a sort of ripple effect, like water.
Most reflexes never make it to your brain. The sensory aspect travels to the spinal cord and the spinal cord itself sends the muscle movement signals to your limbs.
i wonder if a seizure is just all the reflexes going to your brain at once
There are tiny cilia that spin in a certain direction. If they spin in the opposite direction while you're developing in the womb early on, that is how you get organs transposed onto the opposite side of your body.
My friend's husband was born with everything on the wrong side of his body, supposedly had surgery to correct it.
It's called situs invertus. You don't really need to correct it, everything works just like it's supposed to. Unless what they had was *all* of their organs squished into one side and the surgery was to relocate half of them to the other side. It's useful to warn doctors and surgeons, but otherwise it has absolutely no effect on the health or development of the person. Marlene Dietrich was born with it.
Load More Replies...Cilia are dramatically affected by positive ions in a harmful way - they slow down and go every which direction which leads to fluid stagnation. Cell phones are a major culprit. When the cilia go the wrong way before birth, severe health consequences can occur.
The shoulder blade is a more complicated joint than you'd think. While the hip is a ball and socket that just rotates, the shoulder can fold forward. If you sit with your back against against the chair, hold your hand on your collarbone. Then try moving your shoulder forward. You should be able to move the joint forward without moving your back from the chair
And if you have screwy connective tissue like me, you can do even more weird stuff with your shoulders!
joint hypermobility club! my shoulders are pretty normal, but my elbows and knees hyperextend. and don't even get me started on my fingers.
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The hyoid bone is a bone not attached to any other bones in the human body and is only considered the anchor of the tongue
those are interesting. I hate that tomorrow i will have already forgotten all of them
Interesting but many are inaccurate or need more explanation because they are not well written
Load More Replies...Who are these posters and what are their credentials? What are their sources? Some of these "facts" are just BS. Please don't believe everything you read on the internet.
The TLDR version of what i said. Agreed. they're wildly misleading, interpreted very oddly at best, or just weirdly click-baity.
Load More Replies...A few of these are nonsense. I dearly wish a bit more fact checking went on.
Virutally all are deceptive/misleading due to phrasing. If the one about muscles were true, for example, then we'd be strong enough when our brains decided we should be ----- and, in the example given, lifting a car off a child would snap our femurs. It doesn't. This is a physiological response due to *adrenaline*, and if you think you don't hurt after, you're mistaken. Situs inversus is caused by a rare combination of genetic factors, and most with SI do NOT have the ciliary dyskinesia (PCD for short). And you get PCD without having SI. And so on. So, please, do not take these as "fact". (signed, have my MD)
Well, having been a nurse they absolutely CAN believe me about the poop vomit, and CPR in a bathroom and having a cardiac arrest with the whole poop ( and vomit) thing. Worked in CCU. LOVED it BTW. Been there too many times for all 3. Cool Leo! Didn't know that.
Load More Replies...Nobody said this, but you can cut out about 40-60% of your liver and it will grow back.
A lovely function for transplant patients. Regrowth means living donors are an option.
Load More Replies...10% of the population has 6 lumbar vertebrae instead of 5. I found this out when I needed a spinal fusion.
Dear reader. You are now blinking manually. Your breathing has also been shifted into manual mode. You're welcome :)
So, the overall message is human bodies are both totally awesome and totally nonsensical ;D
Yep. In short: That's med school in a nutshell. "WOW!" and 'What the what?"....
Load More Replies...those are interesting. I hate that tomorrow i will have already forgotten all of them
Interesting but many are inaccurate or need more explanation because they are not well written
Load More Replies...Who are these posters and what are their credentials? What are their sources? Some of these "facts" are just BS. Please don't believe everything you read on the internet.
The TLDR version of what i said. Agreed. they're wildly misleading, interpreted very oddly at best, or just weirdly click-baity.
Load More Replies...A few of these are nonsense. I dearly wish a bit more fact checking went on.
Virutally all are deceptive/misleading due to phrasing. If the one about muscles were true, for example, then we'd be strong enough when our brains decided we should be ----- and, in the example given, lifting a car off a child would snap our femurs. It doesn't. This is a physiological response due to *adrenaline*, and if you think you don't hurt after, you're mistaken. Situs inversus is caused by a rare combination of genetic factors, and most with SI do NOT have the ciliary dyskinesia (PCD for short). And you get PCD without having SI. And so on. So, please, do not take these as "fact". (signed, have my MD)
Well, having been a nurse they absolutely CAN believe me about the poop vomit, and CPR in a bathroom and having a cardiac arrest with the whole poop ( and vomit) thing. Worked in CCU. LOVED it BTW. Been there too many times for all 3. Cool Leo! Didn't know that.
Load More Replies...Nobody said this, but you can cut out about 40-60% of your liver and it will grow back.
A lovely function for transplant patients. Regrowth means living donors are an option.
Load More Replies...10% of the population has 6 lumbar vertebrae instead of 5. I found this out when I needed a spinal fusion.
Dear reader. You are now blinking manually. Your breathing has also been shifted into manual mode. You're welcome :)
So, the overall message is human bodies are both totally awesome and totally nonsensical ;D
Yep. In short: That's med school in a nutshell. "WOW!" and 'What the what?"....
Load More Replies...
